#include <fstream>
using namespace std;
ofstream fout ("text.out");
ifstream fin  ("text.in" );
int cuv,lungime,stop = 0;
char s;
int main()
{
    int stop = 0;
    while( fin.get( s ))
    {
        if( ( 65 <= s && s <= 90 ) || ( 97 <= s && s <= 122 ) )
        {
            stop = 1;
            lungime++;
        }
        else if( stop )
        {
            cuv++;
            stop--;
        }
    }
    fout<<lungime / cuv;
}